Adam Pash

The New Scientist has published an article on the importance of sleep when you've got a difficult decision on your plate.

Thinking hard about a complex decision that rests on multiple factors appears to bamboozle the conscious mind so that people only consider a subset of information, which they weight inappropriately, resulting in an unsatisfactory choice. In contrast, the unconscious mind appears able to ponder over all the information and produce a decision that most people remain satisfied with.

To complicate things, who gets enough sleep when there's a complex decision on the table anyway? That said, you might want to put in the extra effort to get a good night's sleep and let your unconscious mind do the heavy lifting for you.